ANSI B126.96.36.199M Metric Specification Hex Nut (Style 1) by Material, Finish and Size
Finished Hex nuts are hexagonal, internally threaded fasteners, mated with bolts, studs, screws, and other externally threaded products. The purpose of a hex nut is to ensure that the bolt, etc., stays in place. Hex nuts of standard thickness are called finished hex nuts.
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